Clinical Trials Logo

Clinical Trial Summary

Aluminum is a very abundant element in nature. Humans are exposed to this metal through the environment, diet, and drinking water, as well as through the consumption of certain medications. Aluminum is not an essential element for human, being able to become neurotoxic when it reaches the brain once ingested at very high doses and, above all, if there is also kidney dysfunction. Silicon is one of the most abundant elements on the planet and although it is not considered an essential element for humans, some beneficial activities have been documented. Silicon has been found to be readily available in food and that 41% of ingested silicon is excreted in the urine, with a significant correlation between silicon ingested with food and urinary silicon excretion. The most bioavailable silicon is that found in the form of silicic acid or orthosilicic acid. Numerous studies suggest that silicon can reduce the oral absorption of aluminum and / or improve its excretion and, therefore, protect against the adverse effects induced by the ingestion of aluminum. In a clinical study with healthy individuals as a control group for Alzheimer's disease, the levels of aluminum excretion were analyzed after the continuous ingestion of water enriched in silicon. The results in the first urine of the morning during the first week of ingestion of the enriched water showed that the excretion of aluminum was 136.9 ± 81.4 µmol / nmol creatinine while in the baseline week it was lower, 98.8 ± 64.3 nmol / nmol creatinine. These results indicated that the Al excreted came from Al stored in the body. The main objective of the study is to evaluate the effect of the consumption of three food supplements formulated with different silicon compounds (monomethylsilanetriol and / or silicic acid) on the urinary excretion of aluminum. The secondary objectives of the study are to evaluate: - the bioavailability of the silicon contained in three food supplements formulated with different silicon compounds. - the effect of the consumption of three food supplements formulated with different silicon compounds on urinary excretion of mercury, nickel, arsenic, cadmium, iron and copper. - the safety of the consumption of three food supplements formulated with different silicon compounds.


Clinical Trial Description

It will be conducted a single-center, randomized, controlled, double-blind clinical trial with four groups in parallel (placebo, Supplement A, Supplement B and Supplement C). The study will be carried out with a total of 40 individuals (10 individuals per group), men and women aged 40 to 65 years. Individuals will have normal serum creatinine levels: up to 1.1mg/dl in women and up to 1.4mg/dl in men. The investigational products involved in this study are four food supplements made from silicon compounds and the corresponding placebos. Each participant will receive a kit containing a bottle with 10 capsules and a bottle of 100 ml of liquid according to the treatments corresponding to the randomly assigned group. During the study, the volunteers will consume one capsule and 100ml of product each day for 7 days. The first morning urine will be collected during the 7 days of treatment and also during the previous 7 days to analyze the baseline values. In addition, on days 6 and 7 of the study, the urine will be collected in three fractions up to 24h to evaluate the bioavailability of silicon. Participants will make a total of 5 visits, including the pre-selection visit. In these visits, the following will be carried out: Revision of Inclusion and exclusion criteria; Informed consent signature;Safety biochemistry; Demographic variables (age, sex), anthropometric variables; Evaluation of dietary intake; Randomization; Delivery of the sampling material; Verification of compliance with dietary requirements; Collection of urine samples; Investigation product delivery; Determination of metals in urine; Registration of Medication and food supplements; concomitants adverse event registry. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05116982
Study type Interventional
Source Fundació Eurecat
Contact Josep M Del Bas, PhD
Phone 0034 977 300 431
Email [email protected]
Status Not yet recruiting
Phase N/A
Start date January 2022
Completion date February 2022

See also
  Status Clinical Trial Phase
Completed NCT04744233 - Bioavailability of Carotenoids From Orange Juice in a Cross-over Study in Healthy Subjects. N/A
Completed NCT03873909 - Bioavailability of Carotenoids Present in Mamey Sapote (Pouteria Sapota (Jacq.) H. E. Moore & Stearn) Fruit N/A
Completed NCT03353857 - Drug-drug Interaction Between Rifampicin and Progestins/Ethinylestradiol and Midazolam Phase 1
Not yet recruiting NCT05121506 - A Study to Investigate the Bioavailability and Skin Absorption of CBD and THC From GT4 Technology in Healthy Adults Phase 1
Completed NCT01267201 - A Study Comparing Drug Availability Of Methylprednisolone In Liquid Form Versus Methylprednisolone In Tablet Form Phase 1
Completed NCT02538393 - Relative Bioavailability of Sorafenib Tablet for Oral Suspension Phase 1
Completed NCT04207372 - Protein Digestibility of Whey and Zein. N/A
Not yet recruiting NCT03951025 - Study of the Bioavailability of a Food Supplement Rich in Melatonin Administered Sublingually and Orally (MELATONIN) Phase 2
Completed NCT01853800 - Relative Bioavailability of Oral Suspension of Rivaroxaban Compared to Standard Tablet Phase 1
Completed NCT00714584 - Pharmacokinetics of Naltrexone Following Intravenous and Oral Routes of Administration in Healthy Volunteers Phase 1
Completed NCT04876261 - Bioavailability of Hydroxytyrosol From Olive Watery Extract Supplements N/A
Completed NCT03886597 - Nutritional Intervention With Table Olives in Healthy Volunteers Phase 1/Phase 2
Not yet recruiting NCT03984916 - Study of the Bioavailability of Three Hesperidin Extracts. N/A
Completed NCT02966704 - Stable Isotope Method to Assess Dietary Protein Quality N/A
Completed NCT02847117 - Bioavailability of the Microconstituents of Natural Chios Mastiha in Healthy Adults. N/A
Completed NCT03048110 - Drug-drug Interaction (DDI) Study to Assess ODM-201 as a Victim of CYP3A4 Inhibition or Induction Phase 1
Completed NCT03773068 - A Study in Healthy Volunteers Investigating How Quickly and to What Extent BAY1817080 is Taken up, Distributed, Broken Down and Eliminated From the Body, as Well as the Difference Between 2 Different Types of Tablets of BAY1817080 and the Difference Between Oral Dose and Dose in the Vein Phase 1
Completed NCT03612700 - Presence of Cyclopropane Fatty Acids (CPFA) in Human Plasma N/A
Completed NCT02376608 - Bioavailability of Omega-3 Food Supplement in Healthy Subjects Phase 1
Completed NCT03886766 - Bioavailability Mechanistic Study of Hot-Melt Extruded Amorphous Solid Dispersions N/A